Calculated Industries 5070-B User Guide - Manual (Page 20)

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baSIC maTh OPERaTIONS
This calculator uses standard chaining logic, which simply means
that the entered mathematical string is evaluated from left to right
without any priority given to different operators.
KeysTRoKe DIsPlay
   
5.
   
1.
   
6.
   
1.5
PERCENT CalCulaTIONS
The  key can be used for finding a given percentage of a number
or for working add-on, discount or division percentage calculations.
KeysTRoKe DIsPlay
      
53.25
       
266.25
    
23.75
      
200.
The  key also allows you to change percentages to decimals
(e.g.,    displays 0.25).
mEmORY OPERaTIONS
Whenever the   keys are pressed, the displayed value will be
added to the Cumulative Memory. Other Memory functions:
funCTIon KeysTRoKe
Add to Memory  
Subtract from Memory    
Recall total in Memory  
Display/Clear Memory  
Clear Memory  